private Certificate readDERCertificate(
InputStream in)
throws IOException, CertificateParsingException
{
ASN1InputStream dIn = new ASN1InputStream(in);
ASN1Sequence seq = (ASN1Sequence)dIn.readObject();
if (seq.size() > 1
&& seq.getObjectAt(0) instanceof DERObjectIdentifier)
{
if (seq.getObjectAt(0).equals(PKCSObjectIdentifiers.signedData))